QB of the future?

Here's the assumption that worries me - not just the modest praise in this post, but I have seen a lot of stronger impressions of KOC in this thread and elsewhere, with words like "magician", "guru", even "QB whisperer".

OK, this team is averaging 25.5 ppg in this very early season. It's 8th in the league. In 2022 with healthy Cousins and a schedule that led to 13 wins, they averaged 25.1. This is NOT the '98 Vikings or the Greatest Show on Turf, by any stretch. 

O'Connell seemed to be a calming influence on Cousins, and in 2 games he seems to have Darnold avoiding the panic moments he had in the past. That's all good, but does it mean he is on the level of coaches like Andy Reid or Denny Green who have shown they can get truly GREAT production from their QB and surrounding cast. To date, KOC is a winning NFL coach because his team was "opportunistic" in 2022 and because Flores' defense is playing great in 2024. As an offensive coach, ability to adapt to players with different strengths is questionable and seems very choosy about QB style. He was shockingly stubborn about some things, like sticking with Alexander Mattison far too long last year, and even thinking Mattison could carry this team going into 2023. 

My point is that a lot of the argument that we can switch seamlessly to McCarthy and he'll be a great QB quickly is based on tremendous confidence in KOC. Has he really earned that esteem??